题目

阅读短文，判断正（T）误（F）。Mary has a big farm. There are many vegetables on the farm. They are tomatoes, cucumbers(黄瓜), potatoes, onions and carrots. At lunch time, Mary likes to eat some tomatoes and cucumbers. At dinner time, Mary likes to eat some potatoes.【1】Mary has a big farm. （_____）【2】There are many flowers on the farm. （_____）【3】There are many cabbages on the farm. （_____）【4】Mary likes to eat tomatoes and onions for lunch. （_____）【5】Mary likes to eat potatoes for dinner. （_____） 利用梯形的面积公式计算上底为2，下底为4，高为5的梯形的面积．设计出该问题的算法及流程图．